Method of mapping physical resource to logical resource in wireless communication system

Abstract

A method of mapping a physical resource to a logical resource in a wireless communication system is described. The method includes dividing a physical frequency band into at least one frequency partition. Each frequency partition is divided into a localized region and a distributed region in a frequency domain. The method further includes mapping the at least one frequency partition into at least one logical resource unit. The localized region is directly mapped into the logical resource unit and the distributed region is mapped into the logical resource unit after rearranging subcarriers within the distributed region.

What is claimed is: 
     
       1. A method for receiving data by a receiver, the method comprising:
 receiving a radio signal comprising a frame which includes an information region and a data region; and 
 demodulating the received radio signal by an OFDM (Orthogonal Frequency Division Multiplexing) scheme, wherein the frame includes a plurality of OFDM symbols in a time dimension and a plurality of subcarriers in a frequency dimension, 
 wherein the data region is divided into a first data region including a first type of one or more resource units and a second data region including a second type of one or more resource units, 
 wherein data in the first type of one or more resource units are mapped to the first data region by a first mapping scheme and data in the second type of one or more resource units are mapped to the second data region by a second mapping scheme other than the first mapping scheme, and 
 wherein the information region includes information to identify resource units as the first type or the second type. 
 
     
     
       2. The method of  claim 1 , wherein the information region further includes information to indicate a start position of at least one of the resource units. 
     
     
       3. The method of  claim 1 , wherein the information region further includes information related to a number of the resource units within the frame. 
     
     
       4. The method of  claim 1 , wherein the information region is divided into a first information part and a second information part, wherein the first information part includes at least one of information to indicate a size of the second information part or information to indicate a coding scheme of the second information part, and wherein the second information part includes the information to identify the type of each of the resource units. 
     
     
       5. The method of  claim 1 , wherein the first mapping scheme allocates the data in the first type of one or more resource units to subcarriers of the first data region in the frequency dimension in a consecutive manner and the second mapping scheme allocates the data in the second type of one or more resource units to subcarriers of the second data region in the frequency dimension in a distributed manner. 
     
     
       6. An apparatus for receiving data, the apparatus comprising:
 a receiver that receives a radio signal comprising a frame which includes an information region and a data region; and 
 a processor, operatively coupled to the receiver, that demodulates the received radio signal by an OFDM (Orthogonal Frequency Division Multiplexing) scheme, wherein the frame includes a plurality of OFDM symbols in a time dimension and a plurality of subcarriers in a frequency dimension, 
 wherein the data region is divided into a first data region including a first type of one or more resource units and a second data region including a second type of one or more resource units, 
 wherein data in the first type of one or more resource units are mapped to the first data region by a first mapping scheme and data in the second type of one or more resource units are mapped to the second data region by a second mapping scheme other than the first mapping scheme, and 
 wherein the information region includes information to identify resource units as the first type or the second type. 
 
     
     
       7. The apparatus of  claim 6 , wherein the information region further includes information to indicate a start position of at least one of the resource units. 
     
     
       8. The apparatus of  claim 6 , wherein the information region further includes information related to a number of the resource units within the frame. 
     
     
       9. The apparatus of  claim 6 , wherein the information region is divided into a first information part and a second information part, wherein the first information part includes at least one of information to indicate a size of the second information part or information to indicate a coding scheme of the second information part, and wherein the second information part includes the information to identify the type of each of the resource units. 
     
     
       10. The apparatus of  claim 6 , wherein the first mapping scheme allocates the data in the first type of one or more resource units to subcarriers of the first data region in the frequency dimension in a consecutive manner and the second mapping scheme allocates the data in the second type of one or more resource units to subcarriers of the second data region in the frequency dimension in a distributed manner.